This fall, high school students across the San Mateo Union High School District start each day by zipping their phones into a lockable pouch that stays sealed until the last bell. The rule is meant to cut distraction, but some students at Aragon High School say a recent campus scare has them asking how they would call for help if something went seriously wrong.
How the rule works
The district board voted unanimously on March 26 to ban student phone use for the whole school day, approved buying QuietCase pouches on May 7 and formally adopted the policy on June 25, according to the district. Phones, smartwatches, earbuds, headphones and tablets must be off or on Do Not Disturb, locked in the pouch and kept out of sight, though students keep the pouch with them. Unlocking devices sit in every classroom and around each campus for use after the final period. San Mateo High is sticking with the Yondr pouches it already used.
The rule also covers school-sponsored trips and rallies unless staff say otherwise. Repeat violations escalate from a teacher confiscating the phone to detention and, after a fourth offense, daily check-in of the device at the office. Students with documented medical needs, IEPs or 504 plans can get accommodations.
The Aragon incident
According to Mercury News reporting summarized by Hoodline, a fight between two Aragon students late last semester brought police to campus, and students were told to take cover in a classroom until further notice. The district called it a shelter-in-place in an email to parents, but some students said they were told it was a lockdown. One sophomore said she learned what was happening only by texting her father, who was nearby.
What the district says
Aragon principal Peter Alvarez told the Mercury News that during an evacuation for fire or severe weather, the school would unlock the pouches so students could use their phones. During an active threat or lockdown, he said, students should not use phones at all, because a ringing or buzzing device could give away where people are hiding.
The district's FAQ says students may not be able to use phones right away in an emergency, that families will be updated through ParentSquare, and that phones will be returned "when it is safe and appropriate." Parents can still reach students by calling the school office, and students can call home from the office.
The policy is the district's answer to the state's Phone-Free School Act (AB 3216), which required every California district to adopt a policy limiting or banning student smartphone use by July 1, 2026. The law does not require an all-day ban; San Mateo Union chose the strictest version.